中間熱交換器を有する小出力オーガニックランキンサイクルの実証試験とその性能評価

抄録

To improve the thermal efficiency of the air-cooled organic Rankine cycle (ORC), we evaluated its performance of ORC with an intermediate heat exchanger (IHEX) realizing the waste heat recovery of the turbine based on the verification test. The turbine efficiency on the thermodynamical output by the adiabatically expanded was 42.3%. We indicated that the ORC with the IHEX could reduce 8.01% the thermodynamic heat exhaust in the condenser than that of the conventional ORC. The thermal efficiency of the conventional ORC was 2.18% whereas the ORC with the IHEX was 2.76%. The IHEX heated the working fluid at the inlet of the evaporator with the exhausted heat of the turbine and could reduce the amount of the heat supplied to its ORC own. As results, the net thermal efficiency of the ORC with the IHEX became 26.6% higher than that of the conventional ORC.